An ear-piercing alarm is an effective way to alert most people about a possible combustion or emergency Flashing lights can be effectual but just condition they are perceptible and the person is not sleeping.
So a Japanese company called Air Wate Safety Service because its gadgets product is offer services to our consumer and it has developed a new type of fire alarm that uses smell instead of sound. The price down to a slightly more reasonable, but still kind of expensive, $225.via
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